Meg has 15 marbles. Roberto has 3 times as many marbles as Meg. How many does Roberto have?

If Roberto has 3 times as many marbles as Meg, we would take megs number and multiply it by three.

3*15

Your answer would be 45 marbles.

Answercounterclockwise rotation about the origin by 180 degrees followed by reflection about the y-axisexplanationthe given figure has verticesrecall that for counterclockwise rotation about the origin, when we rotate figure pqrs counterclockwise through an angle of 180° about the origin, the coordinates will becomenext, we reflect in the y-axis by negating the x-coordinates of the resulting figure to obtain,therefore the correct answer is c